$OpenBSD: patch-src_pf_c,v 1.2 2015/07/31 12:05:36 landry Exp $
--- src/pf.c.orig	Tue Mar 10 15:14:45 2015
+++ src/pf.c	Fri Jul 31 13:55:59 2015
@@ -33,6 +33,7 @@
 # include <net/if.h>
 #endif
 
+#include <netinet/in.h>
 #include <net/pfvar.h>
 
 #ifndef FCNT_NAMES
